CN105048817A - Buck-Boost type high-power bidirectional DC/DC converter with coupled inductors - Google Patents
Buck-Boost type high-power bidirectional DC/DC converter with coupled inductors Download PDFInfo
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- CN105048817A CN105048817A CN201510363475.1A CN201510363475A CN105048817A CN 105048817 A CN105048817 A CN 105048817A CN 201510363475 A CN201510363475 A CN 201510363475A CN 105048817 A CN105048817 A CN 105048817A
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- buck
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- boost type
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a Buck-Boost type bidirectional DC/DC converter with coupled inductors. The Buck-Boost type bidirectional DC/DC converter is characterized in that Buck-Boost type bidirectional DC/DC converter is composed of N paths of bidirectional Buck-Boost circuits through parallel connection, N is greater than or equal to 2 and N is a natural number. Magnetic coupled inductors are adopted to act as the inductors of all the bidirectional Buck-Boost circuits. The coupled inductors are adopted, and the inductors have multiple advantages of high differential mode current sharing inductance, great current sharing effect, small size of the device, low noise and high efficiency under the condition of the same parallel common mode inductance so that equivalent switching frequency can be enhanced, work noise and the size of the inductors can be reduced and conversion efficiency can be enhanced. Both voltage boosting and voltage reduction can be performed in the single direction of the DC/DC converter so that range of application is quite wide.
Description
Technical field
The present invention relates to the fields such as electric automobile, super capacitor and battery energy storage, particularly relate to the two-way DC/DC converter of a kind of Buck-Boost type with coupling inductance.
Background technology
In lack of energy and environmental pollution day by day serious today, increasing pure electric automobile and hybrid power type automobile come into the market.But due to the development bottleneck of power battery technology, the terminal voltage of vapour Vehicular dynamic battery is designed between 180V ~ 720V usually, and the best DC bus-bar voltage of inverter is usually at about 600V, in order to mate electrokinetic cell voltage and DC bus-bar voltage, reduce the ripple current of electrokinetic cell, improve the runnability of whole power drive system, present pure electronic and hybrid power type automobile all adds the two-way DC/DC converter of one-level between DC bus and electrokinetic cell.
Electrokinetic cell electric pressure and DC bus-bar voltage grade quite (voltage ratio is no more than 3.5) and without the need to electrical isolation time, usually select single-phase non-isolated two-way DC/DC converter to the mutual transmission of the coupling and energy between the two that complete electrokinetic cell voltage and DC bus-bar voltage, realize the charging/discharging function of battery, to improve the whole efficiency of system.Nowadays the EHV electric and hybrid vehicle major part of main flow adopts the two-way DC/DC converter of Boost type or Buck-Boost type DC/DC converter to carry out matching voltage grade.
Prior art one
Single-phase non-isolated Boost type converter, as shown in Figure 1.Usually super capacitor or chemical cell are received DC1 side, DC side after the DC side of DC2 side joint electric automobile inverter or charging rectifier, or the direct current input side of double source trackless automobile, if the voltage of DC2 side is lower than DC1 side, then cannot complete DC2 side to DC1 side charge function, and the now electric discharge of DC1 side to DC2 side is uncontrollable.
Prior art two
Single-phase non-isolated Buck-Boost type DC/DC converter, its structure chart as shown in Figure 2.Because these structure both sides are symmetrical, DC1 side both can connect super capacitor, also can connect the DC side of electric automobile inverter.Although this structure can solve the problems referred to above of Boost type, this converter can only in middle low power applications.
Summary of the invention
Object of the present invention be exactly in order to overcome above-mentioned prior art exist defect and a kind of multi-channel parallel Buck-Boost type high-power bidirectional DC/DC converter with coupling inductance is provided, adopt crisscross parallel and voltage is two-way rises the technology that can fall, make this converter applications occasion extensive.
The present invention specifically adopts following technical scheme:
The two-way DC/DC converter of Buck-Boost type with coupling inductance, it is characterized in that being made up of the two-way Buck-Boost circuit in parallel in N road, N >=2, and N is natural number, and the inductance of each two-way Buck-Boost circuit adopts magnetic coupling inductance.
Preferably, converter two DC side circuit structure is symmetrical.
Another preferably, described magnetic coupling inductance adopts forward coupled modes.
Another preferably, stagger mutually operation in each two-way Buck-Boost current phase angle, every phase shifting time is N/mono-in cycle.
Of the present inventionly heterogeneously rise the Buck-Boost type DC/DC converter that can fall, mainly be used in energy storage and the electric automobile fields such as the discharge and recharge of super capacitor or chemical cell, if the voltage of super capacitor or chemical cell exceedes the direct voltage of inverter, then reduction voltage circuit (i.e. reverse booster circuit) is adopted to realize the charging/discharging function of super capacitor; If the voltage of super capacitor or chemical cell is lower than the direct voltage of inverter, then booster circuit (i.e. reverse reduction voltage circuit) is adopted to realize the charging/discharging function of super capacitor.If when this DC/DC circuit power demand is larger, need to adopt the parallel connection of multichannel (phase) DC/DC unit to improve capacity.Independently reactor is often adopted to carry out filtering in existing DC/DC unit, cause whole DC/DC volume large like this, reactor noise is large, even if adopt crisscross parallel to control between each DC/DC unit, the noise reduction of each reactor can not be made, if improve the switching frequency of each DC/DC unit to reduce noise, then loss becomes large, and efficiency reduces.And the present invention adopts coupling inductance, this inductance, under the condition of identical common mode inductance in parallel, has that differential mode current sharing inductor is large, current-sharing is effective, the plurality of advantages such as device volume is little, noise is little and efficiency is high, can equivalent switching frequency be improved, reduce work noise and inductance volume, improve conversion efficiency.
The present invention adopts Buck-Boost two-stage Circuit tuning, and this converter can be worked in very wide input voltage and output voltage range, also according to load power demand, can adjust the module number of parallel operation, to improve the whole efficiency of system.
The present invention adopts multiphase interleaving technology to improve the capacity of DC/DC, input and output ripple can be reduced simultaneously, thus reduce the size of input and output filter, reduce the current stress of power device, optimal design can be carried out, to improve transducer effciency by the introducing of many algorithms.
DC/DC converter of the present invention can boost in a single direction also can step-down, therefore it is general to be of wide application.
Accompanying drawing explanation
Fig. 1 is the two-way DC/DC converter of single phase boost type.
Fig. 2 is the two-way DC/DC converter of Single-Phase Buck-Boost.
Fig. 3 is the two-way DC/DC converter of Buck-Boost type of the present invention.
Fig. 4 is the two-way DC/DC converter of three staggered Buck-Boost types.
Fig. 5 is coupling induction structure schematic diagram.
Fig. 6 is multiphase coupled induction structure schematic diagram.
Fig. 7 is coupling inductance equivalent magnetic circuit.
Fig. 8 coupling inductance works alone magnetic flux figure.
The multiphase coupled inductance equivalent magnetic circuit of Fig. 9.
Embodiment
Below in conjunction with specific embodiment, the present invention is further detailed.
Embodiment one
As can be seen from Figure 3 circuit of the present invention is formed by N road (N >=2) two-way Buck-Boost circuit in parallel, what adopt in circuit is N road coupling inductance, and two DC side DC1 sides and DC2 lateral circuit structure full symmetric, namely the voltage of DC1 side both can than the height of DC2 side, also can be lower than the voltage of DC2 side.Therefore DC converter application of the present invention extensively (as electric automobile, battery energy storage field).Brief analysis circuit working process of the present invention below.
Three staggered Buck-Boost types two-way DC/DC converter circuit topological structure as shown in Figure 4.Three-phase circuit adopts alternating expression control mode, and it mainly refers to that each phase module carrier operation frequency is identical, the operational mode staggered mutually in phase angle, and often the time of being staggered is 1/3rd (N is phase then N/mono-) in cycle to three-phase.Namely drive singal time delay 1/3rd cycle of A circuitry phase module is the drive singal of B circuitry phase module, C phase drive singal also time delay B phase 1/3rd cycle.Therefore the course of work of three-phase DC converter can be regarded three single-phase invertors as and to interlock work, the topological structure of the two-way DC/DC converter of Buck-Boost as shown in Figure 2.
The mode of operation of single-phase Buck-Boost circuit is determined by DC1 and DC2 side connected equipment type (as storage battery, super capacitor, motor), roughly can be divided into four kinds of operating states.1. forward step-down state.Under this state, the voltage of DC1 side is higher than DC2 side, and the sense of current is that DC1 effluent is to DC2 side.Now S1 works on off state, the anti-also diode operation of S3; 2. forward pressure-increasning state.Under this state, the voltage of DC1 side is lower than DC2 side, and the sense of current is that DC1 effluent is to DC2 side.Now S1 is in conducting state always, and S3 keeps last status of processes constant, and S4 is on off state; 3. reverse step-down state.Under this state, the voltage of DC1 side is higher than DC2 side, and the sense of current is that DC2 effluent is to DC1 side.Under this state, S3 is on off state, the anti-also diode operation of S1.The duty ratio of S3 is determined by both voltage ratios; 4. oppositely to boost transition.Under this state, the voltage of DC2 side is higher than DC1 side, and the sense of current is that DC2 effluent is to DC1 side.S3 conducting always under current state, S2 is on off state, and S1 keeps last process status constant.
The lifting/voltage reducing inductance of three-phase circuit does not adopt stand-alone configuration, but adopts coupling inductance.Be about to many group coil windings on same magnetic core.Owing to adopting alternating expression to control, therefore the equivalent frequency in known coupling inductance is three times (N phase is N times) of switching frequency.As shown in Figure 5, the structural representation of multiphase coupled inductance as shown in Figure 6 for the structural representation of coupling inductance.Due to take be forward coupling mode, so the magnetomotive direction produced in coil is identical, as shown in Figure 7, coupling inductance works alone magnetic circuit schematic diagram as shown in Figure 8 to its equivalent magnetic circuit.As can be seen from Figure 8 the magnetic flux at side column place is superposition, and the magnetic flux of three newels is cancelled out each other.If three-phase magnetomotive force value is equal, then in figure, the magnetic flux at R1, R5 place is 1.5 times of R2, R3, R4, and equivalent flux value is less than discrete flux value, thus reduces the size of magnetic core.The equivalent magnetic circuit of multiphase coupled inductance as shown in Figure 9.
Claims (4)
1. the two-way DC/DC converter of the Buck-Boost type with coupling inductance, it is characterized in that being made up of the two-way Buck-Boost circuit in parallel in N road, N >=2, and N is natural number, and the inductance of each two-way Buck-Boost circuit adopts magnetic coupling inductance.
2. the two-way DC/DC converter of the Buck-Boost type as claimed in claim 1 with coupling inductance, is characterized in that converter two DC side circuit structure is symmetrical.
3. the two-way DC/DC converter of the Buck-Boost type as claimed in claim 1 with coupling inductance, is characterized in that described magnetic coupling inductance adopts forward coupled modes.
4. the two-way DC/DC converter of the Buck-Boost type as claimed in claim 1 with coupling inductance, it is characterized in that each two-way Buck-Boost circuit carrier operating frequency is identical, operation is staggered mutually at phase angle, every phase shifting time is N/mono-in cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510363475.1A CN105048817A (en) | 2015-06-29 | 2015-06-29 | Buck-Boost type high-power bidirectional DC/DC converter with coupled inductors |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510363475.1A CN105048817A (en) | 2015-06-29 | 2015-06-29 | Buck-Boost type high-power bidirectional DC/DC converter with coupled inductors |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253675A (en) * | 2016-08-17 | 2016-12-21 | 湖南纽帕科技有限公司 | A kind of vehicular high-power used for electric vehicle two-way DC/DC device |
| CN107332459A (en) * | 2017-08-19 | 2017-11-07 | 万江华 | The nanosecond class pulse generator for EDM system and control method of Wire EDM |
| CN107786090A (en) * | 2016-08-30 | 2018-03-09 | 雅达电子国际有限公司 | With the multi-phase power supply inverter for Transformer Winding and the integrated core of inductor winding |
| CN109510490A (en) * | 2018-12-29 | 2019-03-22 | 河南锂想动力科技有限公司 | A kind of Multi-function ac/dc power-supply system |
| CN110011343A (en) * | 2019-04-04 | 2019-07-12 | 华北科技学院 | Width input bidirectional power supply power supply device |
| CN110034680A (en) * | 2019-04-04 | 2019-07-19 | 华北科技学院 | The control method of width input bidirectional power supply power supply device |
| CN112072914A (en) * | 2020-07-22 | 2020-12-11 | 北京交通大学 | Three-port direct current converter for hybrid energy storage |
| CN113992006A (en) * | 2021-10-27 | 2022-01-28 | 福州大学 | Control strategy and parameter calculation method of high-power three-level DC-DC converter |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253675A (en) * | 2016-08-17 | 2016-12-21 | 湖南纽帕科技有限公司 | A kind of vehicular high-power used for electric vehicle two-way DC/DC device |
| CN107786090B (en) * | 2016-08-30 | 2022-01-21 | 雅达电子国际有限公司 | Multiphase power converter with integrated magnetic core for transformer and inductor windings |
| CN107786090A (en) * | 2016-08-30 | 2018-03-09 | 雅达电子国际有限公司 | With the multi-phase power supply inverter for Transformer Winding and the integrated core of inductor winding |
| CN107332459A (en) * | 2017-08-19 | 2017-11-07 | 万江华 | The nanosecond class pulse generator for EDM system and control method of Wire EDM |
| CN107332459B (en) * | 2017-08-19 | 2023-05-05 | 万江华 | Nanosecond pulse power supply system for wire-cut electric discharge machining and control method |
| CN109510490A (en) * | 2018-12-29 | 2019-03-22 | 河南锂想动力科技有限公司 | A kind of Multi-function ac/dc power-supply system |
| CN110034680B (en) * | 2019-04-04 | 2021-10-19 | 华北科技学院 | Control method of wide-input bidirectional power supply device |
| CN110034680A (en) * | 2019-04-04 | 2019-07-19 | 华北科技学院 | The control method of width input bidirectional power supply power supply device |
| CN110011343A (en) * | 2019-04-04 | 2019-07-12 | 华北科技学院 | Width input bidirectional power supply power supply device |
| CN110011343B (en) * | 2019-04-04 | 2024-01-30 | 华北科技学院 | Wide-input bidirectional power supply device |
| CN112072914A (en) * | 2020-07-22 | 2020-12-11 | 北京交通大学 | Three-port direct current converter for hybrid energy storage |
| CN112072914B (en) * | 2020-07-22 | 2021-08-10 | 北京交通大学 | Three-port direct current converter for hybrid energy storage |
| CN113992006A (en) * | 2021-10-27 | 2022-01-28 | 福州大学 | Control strategy and parameter calculation method of high-power three-level DC-DC converter |
| CN113992006B (en) * | 2021-10-27 | 2023-11-17 | 福州大学 | Control method of high-power three-level DC-DC converter |
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